1005015054661 has 4 divisors (see below), whose sum is σ = 1005437154924. Its totient is φ = 1004592954400.

The previous prime is 1005015054581. The next prime is 1005015054763. The reversal of 1005015054661 is 1664505105001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79967356225 + 925047698436 = 282785^2 + 961794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005015054661 - 2³⁹ = 455259240773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005015054161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211046560 + ... + 211051321.

It is an arithmetic number, because the mean of its divisors is an integer number (251359288731).

Almost surely, 2^{1005015054661} is an apocalyptic number.

It is an amenable number.

1005015054661 is a deficient number, since it is larger than the sum of its proper divisors (422100263).

1005015054661 is an equidigital number, since it uses as much as digits as its factorization.

1005015054661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422100262.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 1005015054661 in words is "one trillion, five billion, fifteen million, fifty-four thousand, six hundred sixty-one".